The ash whitefly is an insect from Europe that feeds on the sap of plants, and which has become a pest in North America.

[3] Encarsia inaron are very tiny wasps measuring approximately 0.5 millimetres (0.020 in), thus requiring a magnifying glass for better visibility.

Ash, pear, and ornamental trees were naked, for leaves have fallen to the ground.

Beginning in 1989 when the parasitoid wasps were established, ash whitefly population declined significantly.

As a result, it saved cities money from being spent on managing ash whitefly infestation.